Set-top unit



FIG. 1 is a top perspective view showing a set-top unit design showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken lines shown in the figure drawings are included for the purpose illustrating structural environment form no part of the claimed design. 

The ornamental design for a set-top unit, as shown and described. 